Transcutaneous analyte sensor

• US 10,624,539 B2
• Filed: 07/03/2019
• Issued: 04/21/2020
• Est. Priority Date: 03/10/2005
• Status: Active Grant

• Current Assignee: DexCom Incorporated
• Original Assignee: DexCom Incorporated
• Inventors: Brister, Mark C., Pryor, Jack, Nolting, John, Leach, Jacob S., Pestana, Luis, Quintana, Nelson, Swanson, Vance, Goode, Jr., Paul V., Thrower, James Patrick
• Primary Examiner(s): Jang, Christian
• Application Number:
  US16/503,263
• Publication Number:
  US 20190320902A1
• Time in Patent Office: 293 Days
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 2560/0223 of calibration, e.g. protocols for calibrating sensors
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/14507 specially adapted for measuring characteristics of body fluids other than blood devices for taking samples of body liquids A61B10/0045
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150534 Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
• CPC Class Codes: A61B 5/6832 using adhesives A61B5/259 takes precedence
• CPC Class Codes: A61B 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/6848 Needles
• CPC Class Codes: A61B 5/6849 in combination with a needle set
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: Y02A 90/10 : Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

The present invention relates generally to systems and methods for measuring an analyte in a host. More particularly, the present invention relates to systems and methods for transcutaneous measurement of glucose in a host.

Claims

1. A sensor system for measuring a glucose concentration in a host, the sensor system comprising:

a transcutaneous glucose sensor configured for insertion into a tissue of a host, wherein the transcutaneous glucose sensor comprises an in vivo portion and an ex vivo portion, wherein the transcutaneous glucose sensor is configured to generate a signal indicative of the glucose concentration in the host;

a mounting unit configured to be placed on a skin of the host, wherein the mounting unit is configured to receive the ex vivo portion of the transcutaneous glucose sensor, wherein the mounting unit comprises sensor electronics, wherein the sensor electronics comprises a radio frequency module; and

a receiver comprising;

a processor configured to cause interrogation of the radio frequency module and to process data received during the interrogation; and

a display configured to display an estimated glucose concentration value associated with the data received during the interrogation;

wherein the radio frequency module is configured to transmit information representative of the glucose concentration to the receiver in response to the receiver interrogating the sensor electronics;

wherein the processor in the receiver and/or a processor in the sensor electronics is configured to implement a sensor expiration period in response to the receiver interrogating the sensor electronics; and

wherein the sensor system is configured to shut down the display of the estimated glucose concentration value upon the expiration of the sensor expiration period.

2. The sensor system of claim 1, wherein the mounting unit comprises a power source configured to power the electronics.

3. The sensor system of claim 1, wherein the sensor electronics is operatively connected to the transcutaneous glucose sensor.

4. The sensor system of claim 1, wherein the sensor electronics comprises an antenna configured to radiate or receive radio frequency signals.

5. The system of claim 1, wherein the sensor electronics are in a housing, wherein the sensor electronics further comprises an antenna, wherein the antenna extends substantially around a periphery of the housing.

6. The system of claim 1, wherein the sensor electronics are in a housing, and wherein a height of the housing is no more than 0.250 inches in its smallest dimension.

7. The sensor system of claim 1, further comprising:

an internal power supply; and

a switch operatively connected to the internal power supply, the switch configured to switch between a first state and a second state, wherein the internal power supply is configured to be in a first power mode when the switch is in the first state and in a second power mode when the switch is in the second state, wherein the first power mode is configured to supply less power to the sensor electronics than the second power mode.

8. The system of claim 7, wherein the internal power supply provides a bias voltage for the transcutaneous glucose sensor to generate the signal indicative of the glucose concentration.

9. The system of claim 1, wherein the receiver is configured to power the sensor electronics via inductive coupling.

10. The system of claim 9, wherein the inductive power is provided when the receiver is placed in proximity to the sensor electronics.

11. The system of claim 1, wherein the sensor system is associated with a serial number.

12. The system of claim 11, wherein the sensor electronics is configured to transmit the serial number after insertion of the transcutaneous glucose sensor in the host.

13. The system of claim 12, wherein the serial number includes information including an intended duration of the transcutaneous glucose sensor.

14. The system of claim 1, wherein the system is configured to transmit the sensor expiration period after the insertion.